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These 11kV CB's are both in the switchboard and feed each end of the ring from the board. To summarise : Supplies to the board are 1. 11kV from the local network, and 2. two gensets (each with their own 11kV CB). Load is two 11kV CB's feeding the ring.

We have a site requiring 2 x 1MVA diesel gensets to feed an 11kV switchboard, each through a separate 11kV CB, with 2 x 11kV CBs feeding a ring main (load around 1MVA) and a feed from the network (for when the 2 gensets are not operational) through the 5th 11kV CB. 1. How do we calculate the...